All sound halts for one minute at midnight on Mondays

[Leonardo Jeanteur]

Every week, on Monday at 00:00 all sound halts until the clock turns to 00:01.
(Note as I often get confused with midnight/midday notations, I am referring to the minute after Sunday 23:59).

When this happened the rhythmbox process had been running for more than a day, and I do not know if this happens if rhythmbox was launched on Sunday.

I can confirm at the very least that this happened twice when the process was started on the previous Wednesday, and once on the previous Friday at 12:12.
This bug happened to me many more times, but I did not check the process' information those times.

The song timer stops during this minute.
The last time this happened the song skipped a minute when it resumed, but from what I remember of the previous times the song had started off where it stopped (I could remember wrong though). The only difference I can think of between the last occurrence and the previous ones would be that I did not use any buttons this time around.

What I expected to happen:
    The current song keeps playing
What happened instead:
    The song halted for one minute

Steps to reproduce:
#1 Open Rhythmbox (if possible not on Sunday)
#2 Wait for Sunday
#3 Start listening to music before Sunday 23:59:59
#4 Wait for Monday 00:00 while music is still playing
The song will stop until 00:01

```
$ lsb_release -rd
Description: Ubuntu 18.04.3 LTS
Release: 18.04

$ apt-cache policy rhythmbox
rhythmbox:
  Installed: 3.4.2-4ubuntu1
  Candidate: 3.4.2-4ubuntu1
  Version table:
 *** 3.4.2-4ubuntu1 500
        500 http://fr.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status
```
Processor: Intel® Core™ i7-6600U CPU @ 2.60GHz × 4
GNOME: 3.28.2

[Leonardo Jeanteur (speedphoenix)]

As this happened again, and I paid more attention to the time, it seems that the sound doesn't halt exactly at midnight, but rather during the first minute of Monday.

All happenings of this but were between 00:00:00 and 00:00:59 so far